The Manic Pixie Dream Girls of Antiquity

(1) It's not a bad idea to compare contemporary fiction with ancient fiction. Most of the 2500+ yr old blockbusters are basically superhero movies.

(2) "Yamato Nasdeshiko" is not a "Magical Girlfriend", rather it is a different ideal of Japanese femininity which may or not be associated with magic.

(3) "Magical Girlfriend" is not Japanese in origin. See "I dream of Jeannie"